Patent US4621022A successfully refreshed from Google Patents.
US4621022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable plastics granular material having at least one orifice
Assignee: WiniaDaewoo Co Ltd
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Filing: 1986-01-28
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Granted: 1986-11-04
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Expires: 2006-01-28
Abstract
Abstract The invention relates to a plastics granular material of foamable particles which are derived from a star-shaped basic body with at least three limbs lying in a plane, the particles having at least one orifice. Preferably, these granular material particles are provided with three limbs and each limb is provided with an orifice. Furthermore, the invention has as its subject a packaging material which is obtained by foaming of the said plastics granular material. This packaging material displays a lower bulk density, improved pourability with simultaneously improved packing effect (good packaging properties, large void volume).
Inventors
- 👤 Gunter Kohaut
- 👤 Werner Weber
- 👤 Herman Groenendijk
- 👤 Adrianus C. Poppelaars
- 👤 Wilhelmus H. J. Janssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:24
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/02; B65D81/05; B65D81/09; Y; Y10; Y10S; Y10S206/00; Y10S206/814; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/2982
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
45 words
A plastics granular material of foamable particles in star shape, wherein the plastics granular material consists predominantly of particles which are derived from a star-shaped or cloverleaf-shaped basic body with at least three limbs lying in a plane, the particles having at least one orifice.
Claim 2
Dependent Claim
45 words
A plastics granular material of foamable particles in star shape, wherein the plastics granular material consists predominantly of particles which are derived from a star-shaped or cloverleaf-shaped basic body with at least three limbs lying in a plane, the particles having at least one orifice.
Claim 3
Dependent Claim
19 words
A plastics granular material as claimed in claim 1, wherein at least one of the limbs has an orifice.
Claim 4
Dependent Claim
18 words
A plastics granular material as claimed in claim 1, wherein the center of the particles has an orifice.
Claim 5
Dependent Claim
17 words
A plastics granular material as claimed in claim 1, wherein the orifice is shaped round to oval.
Claim 6
Dependent Claim
24 words
A plastics granular material as claimed in claim 2, wherein the area of the orifice is 25% to 75% of the respective limb area.
Claim 7
Dependent Claim
16 words
A plastics granular material as claimed in claim 1, wherein the particles are at least three-limbed.
Claim 8
Dependent Claim
20 words
A plastics granular material as claimed in claim 1, wherein the thickness of the particles is 2.5 to 7 mm.
Claim 9
Dependent Claim
39 words
A plastics granular material as claimed in claim 1, wherein the granular material particles are three-limbed and one limb is 4 to 6.5 mm, another limb is 4 to 6 mm and another limb is 2.5 to 7.0 mm.
Claim 10
Dependent Claim
19 words
A packaging material of foamed plastics particles, obtained by foaming the plastics granular material as claimed in claim 1.
Claim 11
Dependent Claim
18 words
A packaging material as claimed in claim 9, wherein at least one of the limbs has an orifice.
Claim 12
Dependent Claim
17 words
A packaging material as claimed in claim 9, wherein the center of the particles has an orifice.
Claim 13
Dependent Claim
18 words
A packaging material as claimed in claim 9, wherein thickness of the particles is 8 to 20 mm.
Claim 14
Dependent Claim
35 words
A packaging material as in claim 9, wherein the particles are three-limbed and one limb is 16 to 40 mm, another limb is 16 to 40 mm and another limb is 8 to 20 mm.
Claim 15
Dependent Claim
28 words
A packaging material as claimed in claim 9, wherein, upon pouring out into a loose heap, the void volume of the unvibrated poured-out fill is at least 60%.
Claim 16
Dependent Claim
21 words
A packaging material as claimed in claim 9, wherein the particles consist of polystyrene and are expanded with a blowing agent.
Claim 17
Dependent Claim
14 words
A plastics granular material as claimed in claim 1, wherein the orifice is lenticular.
Claim 18
Dependent Claim
14 words
A plastics granular material as claimed in claim 6, wherein the particles are six-limbed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |